package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.CustomException;
import com.itheima.entity.Dish;
import com.itheima.entity.DishFlavor;
import com.itheima.entity.SetmealDish;
import com.itheima.dto.DishDto;
import com.itheima.mapper.DishMapper;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import com.itheima.service.SetmealDishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @author Morty
 * @create 2022 09 24 15:31
 */
@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService service;
    @Autowired
    private SetmealDishService setmealDishService;

    /**
     * 新增菜品，同时保存对应的口味数据
     *
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        Long dishId = dishDto.getId();//菜品id
        //获取菜品口味列表，遍历列表，为菜品口味对象属性dishId赋值;
        List<DishFlavor> flavors = dishDto.getFlavors();
        /*flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());*/
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishId);
        }

        //保存菜品口味数据到菜品口味表dish_flavor
        service.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);

        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> dishFlavors = service.list(lambdaQueryWrapper);
        dishDto.setFlavors(dishFlavors);
        return dishDto;
    }

    /**
     * 修改菜品信息 带口味
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        this.updateById(dishDto);
        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        service.remove(lambdaQueryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishDto.getId());
        }

        service.saveBatch(flavors);
    }

    /**
     * 批量/单个删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteByIdsWithFlavor(List<Long> ids) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.in(Dish::getId,ids);
        dishLambdaQueryWrapper.eq(Dish::getStatus,1);
        if(this.count(dishLambdaQueryWrapper)>0){
            throw new CustomException("有菜品正在售卖中，不能删除");
        }
        LambdaQueryWrapper<SetmealDish> setmealDishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealDishLambdaQueryWrapper.in(SetmealDish::getDishId,ids);
        int count = setmealDishService.count(setmealDishLambdaQueryWrapper);
        if (count>0){
            throw new CustomException("有菜品关联套餐，不能删除");
        }
        this.removeByIds(ids);
        //清理当前菜品对应口味数据---dish_flavor表的delete操作

        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(DishFlavor::getDishId, ids);

        service.remove(lambdaQueryWrapper);

    }

    /**
     * 修改菜品售卖状态
     * @param status
     * @param ids
     */
    @Override
    public void updateStatus(int status, List<Long> ids) {
        for (Long id : ids) {
            Dish dish = this.getById(id);
            dish.setStatus(status);
            this.updateById(dish);
        }
    }

    


}
